Hitting performance has been highly correlated to bat swing velocity. Common practices use weighted implements immediately preceding hitting performance. Purpose: Therefore, the purpose of this study was to determine the influence of different weighted warm-up bats on 3-D bat swing kinematics. Methods: 22 recreationally trained college aged participants completed three warm-up conditions. Participants performed a self -selected warm up with a normal weight bat (NW); heavy weight bat (HW) or light-weight bat (LW) followed by 5 maximal swings within the 3-D capture volume and analyzed to assess swing kinematics. Results: A 2 x 3 RM ANOVA was used to analyze mean differences for maximum bat velocity (MBV), maximum back elbow extension (MEE), percent of swing at maximum bat velocity (%MBV), percent swing at maximum back elbow extension (%MEE) and bat velocity at maximum elbow extension (BVMEE). There was no significant (p > 0.1) interaction for sex in any variable, therefore, groups were collapsed. After collapsing, there was no significant (p > 0.1) differences in MBV following HW, LW or NW warm-ups. There were also no significant (p > 0.1) differences in %MBV, %MEE and BVMEE between any conditions. However, there were significant (p < 0.1) differences in MEE following HW, LW warm-ups. This was followed up with a LSD pairwise comparison demonstrating a significantly (p < 0.1) greater elbow angle in NW than HW warm-ups. Conclusion: These results indicate that warming up with different weighted bats has no effect on MBV, however there was a difference in overall kinematics.
Listed In: Biomechanics, Sports Science